Java tutorial
/** * This file is part of Location Service :: Admin. Copyright (C) 2014 Petteri * Kivimki * * Location Service :: Admin is free software: you can redistribute it and/or * modify it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or (at your * option) any later version. * * Location Service :: Admin is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General * Public License for more details. * * You should have received a copy of the GNU General Public License along with * Location Service :: Admin. If not, see <http://www.gnu.org/licenses/>. */ package com.pkrete.locationservice.admin.controller.mvc; import com.pkrete.locationservice.admin.converter.ConverterService; import com.pkrete.locationservice.admin.exception.ObjectNotFoundException; import com.pkrete.locationservice.admin.model.language.Language; import com.pkrete.locationservice.admin.model.owner.Owner; import com.pkrete.locationservice.admin.service.LanguagesService; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.springframework.ui.ModelMap; import org.springframework.web.servlet.ModelAndView; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.validation.BindingResult; import org.springframework.validation.Validator; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.SessionAttributes; /** * The {@link EditLanguageController EditLanguageController} handles the * requests that are related to editing a language object and then saving it to * the database. This class extends abstract * {@link BaseController BaseController} class. * * @author Petteri Kivimki */ @Controller @RequestMapping("/editlanguage.htm") @SessionAttributes("language") public class EditLanguageController extends BaseController { @Autowired @Qualifier("converterService") private ConverterService converterService; @Autowired @Qualifier("languagesService") private LanguagesService languagesService; @Autowired @Qualifier("languageValidator") private Validator validator; @RequestMapping(method = RequestMethod.POST) public ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, @ModelAttribute("language") Language language, BindingResult result) throws Exception { validator.validate(language, result); if (result.hasErrors()) { return new ModelAndView("edit_language", new ModelMap()); } language.setUpdater(getUser(request).getUsername()); /* Save language to DB */ if (!languagesService.update(language)) { throw new Exception("Updating language failed."); } /* Update logged in user */ HttpSession session = request.getSession(); session.removeAttribute("user"); session.setAttribute("user", usersService.getUser(request.getRemoteUser())); /* Return to languages page */ return new ModelAndView( "redirect:languages.htm?select_language=" + request.getParameter("select_language")); } @RequestMapping(method = RequestMethod.GET) public String initializeForm(HttpServletRequest request, ModelMap model) throws Exception { String id = request.getParameter("select_language"); Owner owner = getOwner(request); Language lang = languagesService.getLanguageById(this.converterService.strToInt(id), owner); if (lang == null) { throw new ObjectNotFoundException(new StringBuilder("Language not found. {\"id\":").append(id) .append(",\"owner\":\"").append(owner.getCode()).append("\"}").toString()); } model.put("language", lang); return "edit_language"; } }